D.Gray-man (ディー・グレイマン Dī Gureiman) is a manga series by Katsura Hoshino. It is a Gothic-fiction manga first serialized in 2004 in Weekly Shōnen Jump. It is an ongoing series and is currently up to 126 chapters. There is also a novel series called Reverse that tells the characters' backgrounds. As of May 1, 2007, VIZ Media has released the first five volumes in the United States. An anime version began airing on October 3, 2006 in Japan, but has yet to be seen in North America.

Many characters and their designs were from some of Katsura Hoshino's previous works and drafts, such as Zone, Book-man, and Continue, and her assistants. Earlier titles considered for the manga were Dolls, Chronoa, and Zone.